Trimming and punching machine for forged blanks



J. GAVURIN July 22, 1952 TRIMMING AND PUNCHING MACHINE FOR FORGED BLANKSFi ledJune 10, 1 949 5 Sheets-Sheet 1 q mmvron W July. 22, 1952 J.GAVURIN 2,604,164

' mum AND PUNCHING MACHINE FOR FORGED BLAu s Filed June 10. 1949 5SheetsSheet 2 'mmumc AND puncumc MACHINE FOR FORGED BLANKS Filed June10. 1949 J. GAVURIN July 22, 1952 s Shets-Sheet s IN VEN TOR.

M 147 roe vzr J. GAVURIN July .22, 1952 Y TRI-MHING AND PUNCHING MACHINEFOR FORGED BLANKS' Filed'June 10. 1949 Sheets-Sheet 4 x m f Z J. GAVURIN2,604,164

5 Sheets-Sheet 5 A INVENTOR.

TRIMMING AND PUNCHING MACHINE FOR FORGED BLANKS July 22, 1952 Filed June10, 1949 Patented July 22, 1 952 TRIMMING ES PAT-1E 7 Jacob Gavurin,Brooklyn, N. Y.

Application June 10, 1949, SerialNo. 98,180 if. .TJ"... If (iClaimsi(01.164-43) J 1 a This invention relates to a machine for trimming andpunching forged blanks and relates more particularly to an automaticmachine arranged for continuous operation and having novel feeding meansfor receiving the blanks and deliveringthem to the punching and trimmingstation, trimming the flash from the blank while simultaneously punchingany openings in the blank, delivering the finished blank to one chute orreceptacle and delivering the flash to another.

The machine ofthe present invention is efiective for trimming forgedblanks of a wide variety and which have been formed by any die rollingor drop forging operation, It. is .most useful, however, in connectionwith the roller forging machine which is disclosed in my co-pendingapplication Serial No. 95,309, filed May 25, 1949. This machine employsdriving means which may be conveniently'used for driving the trimmingand punchingmachine of the present invention and the latter may beplaced in close juxtaposition to said forging machine and receive theblanks directly as they are forged for operation on by the instantmachine.

In some instances, however, it may be desirable to heat the stock beforethe forging operation and'permit cooling before the trimming operation.For this purpose the present machine is also provided with a conveyorprovided with fingers which grasp the forged blanks, conveys them for asufilcient period of time to effect cooling and then delivers them tothe primary feeding means of the trimming machine.

Thus, an important object of the present invention, in its completeaspect, is to provide an automatic machine capable of continuousoperation which receives the untreated stock and delivers the finishedblank, ready for further operations, such as machining, drilling,grinding and polishing, if such is necessary.

Afurther object of the invention is to provide a punching assemblyhaving improved means for accurately positioning the forged blankrelative to the trimming dies and for facilitating removal of thefinished blank and the waste which has been trimmed from the blank. v

In accordance with the present invention, the rolled, hot blank isgrasped by fingers mounted in spaced relation on the. conveyor beltwhich traversesa tortuouspath ofconsiderable length although the overalldimensions of the entire assembly are relatively small. The cooled blank'is then delivered to a novel feeding assembly formed with inwardlymovable, cam-operated fingers which move the blank to the trimming andpunching station and-accurately deposit it on a female die at whichinstant a male diedesgends and trims the flash from the blank whileat;the same time straightening any deformities in the blank- 1 4 I Ayieldable plunger within the female die re cedes as the male diedescends-andthere is suf},

ficient resistance to the yieldin'g movem t to} bring aboutastraightening of the blank, "should there be any; deformation thereinduring the rolling operation, by the compressive action lie-- tween themale.

now picked anddelivered' to on'e chute while the blank is delivered toanother chute. T lnthedrawingsi' 1 Fig. 1 is a plan view of a'trimmingand punching machine embodying the present invention with the punchpress assembly for the, upper" or male die removed. I ,Tif.

Fig. 2 is a side elevation thereof partiallyin section, the part insection being taken online 2-2 (if Fig.1. f Fig. 3 is a broken sectiontaken on line 3-3 ofFig. 1. I

Fig. 4 is a transverse section" taken 4 4 ofFig.3. Q Fig. 5 isa brokensection takenfon'line 5- 5 '0fFig-3- f J .f' I '1 1 Fig. 6 is abrokenside elevation of the conveyor for the trimmed blank: i 1 T I Fig.'7 is similar toFig; 6 but shows lie-parts in a diiferent position; i, M

Fig. dis a broken sideelevation of, the conveyor for the flash. v I jFig. 9 is similar to Fig. 8 but shows the parts ina diiferent position;I 1

Fig. 10 is a broken section taken through apart of the machine.- r Fig.11 is another brokensection taken through a part of the machine. Fig.1,2is a broken perspective view of the feeding mechanism. 7 1 E Fig. 13 issimilar to Fig. 12 but 'showsthe parts in a difierent-operatingposition; "Fig. 14. isa 'side elevation'of he conveyor comprising theblank cooling means." 1 V A Fig. 15 is a plan view'partlyinsection oftheblank gripping unit in open position. V

.Fig. 16 is similar to Fig. 15 but shows the blank gripping unit inclosed position. 1 1 i The feeding means fortherolled blanksare.operated'bytwo spaced reciprocatingrods l'il and I I which are driven byany.. suitab'le means. such ,7 as thatsl' own in copending] applicationPl! oats-e its PUNoHINGMAoHmE FOR I FORGED BLANKS V a ie' anfihepiungeri The dash which is now freed 'froin' the trimmed tank's"viously referred to. These rods correspond to rods H4 and H illustratedin such application.

If the rolling operation is done while the metal is cold or if there isno particular reason for cooling the rolled blanks before they arepunched and trimmed they are fed along frame member I2 where they arepicked up by reciprocating jaw members I3 and I4 which are mounted onslides I5 and I6 by means of'apin and: a-slot connection I1 whichpermits adjustment of the jaw members relative to their supportingslides. The slides have tracks 2| which are received in trackways 22 inblocks 23 and 24. Theseblocks have. tracks 25 which are received intrackways. 2cm

fixed frame members 3|] and 3|. A cammember 32 is pivoted at 33 on eachblock and inward movement of each slide I5I6 is: produced by a.

diagonal cam portion 34 which engages, a diagonal edge 35 of anextension 36 of the slide.

Blocks 23 and 24 are connected with driving rods I'Iland IIrespectively. asshown at 40-. As the rods and the blocks moverearwardlyto'star-tmg: position the'lower ends of cams 32-contact fixedstops 41 and rotate the'cams in a counterclockwise direction (Fig. 12),thus moving the slides and the jaw members carried thereby inwardly' topickup theformed-blank and; as the-rods moveforwardlyonthe beginningof-thenext cycle thejaws move forwardly and-areiretained in their inwardposition byvirtue; of the upper ends; of cams 32, contacting the outersurfaces of. extensions 34.. They retainthis positionuntil the blocksmove forwardly to a point wherein cams-32 contact cam' lifters 42' atwhich time the slides and the jaw members are released for outwardtravel which may be accomplished by springs (not hown).-

Cam, lifters are carried on a cross piece 43 which is moved to anadjustedfixed position by means of. a lead screw 44 journalled' in framemembers 45 and. 48.-

The cutting and trimming assembly embodies a punch press arrangement.which is driven by means of a crank shaft 46 journalled in uprightframe. members. 41 and 5.I. Any suitable driving means may be employedfor turning this; shaft such as cranks 52. towhich areconnected drivingrods 53 which may be connected with a gear 54 keyed to. one of theshafts 5501 the. rollingasse'mbly 56 which forms the. silbie'ct. matterof my coepending. application.

A central crank portion 60. supports a shaft M which is; received inbearings 62 carried atthe upper end of a plunger 63. As shaft. 46rotates, plun er 63 reciprocates: and produces vertical reciprocatingmovement in a punching assembly 64 which includes a platef 6,5. carryinga, shaft 66 disposed in an opening 61. The lower'end of theplunger isprovided with av collar to which is mounted on the shaft.

The punching assembly further includes a lower plate 'II secured inspaced relation with the upper plate by-means of sideplate's. I2. Theassembly is mounted for vertical reciprocating movement in trackways'I3. On the lower surface of plate II a recess 1-4. isformedwhichreceives the male or punching die I5. shaped in accordance with the.outer contour of the finished blank. To free the die from the workafterthe trimming operation a depressible. plate 16 mountedon pins 11.isurged downwardly by springs BI. Anjintermej'diate plate 82 is mountedfor reciprocating movement on pins 83 and is urged upwardly by springs84. This plate ca-rries a punch 85 for punching out any central portionof the blank and is moved downwardly independ= ently of the die 15 by aprojection 86 of collar 'IIJ which engages a raised portion 90 on plate82. The punch passes through an opening in male die I5. Plunger 63 has arocking action at its upper end and when it moves to the verticalposition of Fig. 3 projection 86 has moved plate 82 carrying plunger 85downwardly.

The female die: 9| hasan} opening- 92?;shaped complementary to the maledie and a plunger 93 therein which moves the finished blank 91 out ofthe recess at the end of the operation. The plunger ismounted on a plate94 which is supported by pins 95 which are mounted for verticalreciprocating movement in frame members 96.

This plate is urged upwardly by springs I00 but. inorderto make theupward travel more positivelinks IIlI are pivoted on the lower surfaceof the plunger which in turn is connected with one arm I02 of abell-crank lever centrally pivoted at I03. The other end I 04ofthebellcrank lever is engaged by the terminals of a driving member I05mounted for rotation on shaft I06. 7

The rolled blank which include the flash which must be-trimmed bythetr-imming'dieassembly is moved to trimming positionby jaw membersI3-I4 just described and the male'die descends for thetrimmingoperation. As the male die ascends; theplunger moves theblankupwardlyoutof recess 92; The upper-surface of the plunger is nowplanewith the pp rsurfaceof the female die; Separatemeansarenow provided formoving thefinished blank" forwardlyto deposit it in achute III} andformovingthe flash 93 forwardlyto deposit-it in 'a second chute III. Thefirst means comprise an arcuate finger 2 carried on a shaft H} which isrigidly mounted on an angle bracket I14. 5

Thisbracket isadjustably secured; by means of a, pin and slot connectionII5 with. a second bracket I-IB which is pivoted atone end III to. aplate I2'I'. This plate issuitably secured tQ'blOCk 23. and is arrangedto travel with it. After the trimming operation the'block movesforwardly, bringing with it,th e new blank for trimming and punching andthis travel also advancesfinger; I I2 which. moves the finished; blankto Qlflllte I IJQ. The finger sl des; ve th op o he female.v die 9'I dueto gravity. At the end of th stroke it s be raised for; the tu n. tra lso s. to avoid' displacing the new blank about to be t mm d. h s s'accoml shed by he. rran m i s ow n Figs- 6 nd; 6.1 T e. opp si end o r cket ari s a lat ra y. extendin n p 2 wh ch un er ies a, la e e ur d-tome rame2 y a n; a d slo mou t I124... A he ndi f its fo ward str k pin 22crintastsan inclined surface, 260f a pri ur ed ca n ins membe 9 mountedn a so Il This sli htly ra ses. t e p n. and nthere umstroke itrides upan inclined surface I32 of plate I23. All the end of the returnstrokethe pin has passed the i er end, H9. of pla e 123 and he. brac efalls to starting position,

The means for conveying the fiashor trimming to chute H I is shown-inFigs. 8 to 111." An assembly I33 includes a support I34 having a trackI35 mo-untedin trackawayl2I- (Fig. 4) This support is connected with therod II and second block 24- by a rod I38 and bracket I39 and is arrangedto travel therewith. It is further supported for reciprocating travel bya track- I36 mountedin a trackway I31 in frame member I40. Theassembly.includes. an upperfinger I.4 1- which is fixed; and a lower finger I42which is arranged to move toward the fixed finger to grasp the trimmingfor delivery to chute III. Spaced set screws I43 (Fig. 11) permit theflash to be grasped on opposite sides of the opening formed byseparating the flash from the trimmed blank.- The lower or movablefinger I42 is pivoted at I44 and a pivoted link I45 carried at itsopposite end is provided with a pin I46 at its lower end. Thus, as thepin moves down, against the action of compression spring I53, thegrasping end of the finger I42 moves up and grasps the flash.

a Means for moving pin I46 downwardly comprise an elongated cam plateI50 carried by a vertical supporting plate I5I which is mounted forlimited vertical movement in the frame I40. A supplemental frame memberI52'acts as a track to retain plate I5I in sliding engagement with frameI40. Supporting plate I5I is urged upwardly by springs I53 inclinedforward terminal portion I5'4and a downwardly inclined rear terminalportion I55. On its forward travel (Fig. 8) pin I46 rides on the lowersurface of cam plate I50, thus raising the pivoted flash-grasping fingerI42 and moving the flash forwardly to chute II I-. As it reaches itsforward end of travel, the'pin is moved upwardly by spring I50 andit-rides up cam surface I54 thus forcing cam plate I50 and its supportdownwardly to the position of Fig". 9. Thus, on its rearward travel thepin rides the upper surface of the cam plate and when it passes the'rearterminal, the plates moves back to the position of Fig. 8, due to theaction of springs I53 and on its next forward travel it moves down camsurface I55 to the position of Fig. 8. i

In its rearward travel the supporting element ISI for cam plate I50 isretained in its'lowered position by means of a hinged finger I60 topre-' vent'binding. On its forward travel the finger is moved byfriction in a counterclockwise direction (Fig. 8), thus releasing thesupport for upward movement.

In the event that the stock is not heated prior to the rolling operationwhich is performed by the machine of my co-pending application orif thework is of such character asto have a rela-. ti'velythin fiash and nocooling is required; the fingers I 3I4 pick up the rolled blank in themanner earlier described and operate upon it.

If cooling is required, the conveyor means shown in Figs. 14 and areemployed. The conveyor assembly is so positioned relative to the rolling assembly as to successively pick up each rolled blank with theflashing yet intact, convey it in a tortuous path of such length as toeffect sufficient cooling, and then deliver it to the fingersI3-I4 whichfeed it to the punching and. trimming means earlier described. p v

Fig. 14 shows the whole arrangement schematically and certain details ofthe conveyor assembly as well. So far as the die rolling machine isconcerned, this figure shows a frame I65 which provides journal bearingsfor upper and lower die rolling members I66 and I61 whichare suitablydriven by means which are not shown. A gear I12 is also driven by thegears associated with the die' rolling members and a crank I13 securedradially ofsuch gear is connected at its outer endto a rod I14 whichimpartsrecip'rocat ing, motion to a work feedingmember l15. A heater.I16 .heats the stock befor -it is engaged by'the dies. The rolled blankis fed to a platform I11. All of the foregoing structure formsthesubject matter of ,my co-pending application earlier referred-to. Fig.14 further shows the driving rod 53 connected with the upper dieassembly for driving shaft 46. I The conveyor assembly includes verticalframe members I8I, I82, I03 and I84 which provide bearings for rollersI85 which support an end.- less conveyor belt I86. The member I86 may bea belt or a chain and in Figs. 15 and 16 is shown as two spaced chainsI81 and I88. The blank gripping members which are mounted in spacedrelation on the belt are designated generally by the numeral I89 in Fig.14 and the details thereof are shown in Figs. 15 and 16.

' Each such unit comprises plates .193 and I04 having flanges I whichare secured to the chains by the headed pins I96 forming the pivots forthe links of the chains. A bell crank lever is pivoted on each plate at200 and one leg 20I thereof is provided with a roller 202 which engagesa fixed cam member 203 to close the assembly and a cam member 204 toopen the same. The opposite leg 205 is connected with a pivoted link206, the inner end of which is connected with a slide 201 mounted formovement transversely of its supporting plate.

. Suitable detent means for holding the bell crank lever in the open orclosed position may comprise a spring pressed pin 2I0 which engages oneor the other of two spaced notches 2II.

In operation, the rolled blanks are fed over frame I11 where they arepicked up by units I80 which are caused to move to closed position bythe rollers on the bell crank lever contacting cams 203. Th belt is ofsuitable length as to effect cooling of the blanks at which time theunits open upon contact with cams 204 at which time they are picked upby fingers I3I4- and are fed to the punching and trimming station.

The male die descends along with the punch and the flashing is picked upby fingers I4 I--I42I which deliver. it to chute II I. Simultaneously,pivoted finger II2 moves the finished blank to: chute III) and theoperation is complete. A. driving gear not shown is arranged forcontinuous rotation and while it is not shown, it may be said to effecta complete operation of the entire machine with each revolution thereof.Utilizing a single blank, four revolutions or cycles are required toprocess the said blank from the raw material intoa finished product; Inthe first cycle, the blank portion of a piece of stock fed to theformingjaws, formed and the jaws retracted. The second cycle feeds the formedblank into engagement with the rollers, severs the blank release at2l0of the. cycle. The firstfeeds the stock to the forming jaws. During thesecond cycle the feeding operation is repeatedyhowever the formed orbentstock is moved into engagement with the rollers I66, I61, rolled andsevered into a blank and stripped from the rollers within the first 150of the second cycle.- The remainder of the cycle merely returnsthe-rolling dies to normal. At approximately 350 of the second cycle thejaws I3, I4 are moved into engagement with the rolled blank. On thesucceeding, or'third cycle the closed jaws I 3, I4 m'ove forwardly for180EthereofL However atrapproiz'imately514i? of the cycle the jaws I3,14 release the blank on the die 9| and expandoutwardly in time to clearthe now :descending trimming in'ale die which is effective from 140? to200 of the cyle. As the jaws 13,!4 return, the plunger has ascendedsufficiently to permit the passage thereof. The remainder of the cycleis utilized in returning the parts to normal. Rodslc and Hreciprocate'co'ncurrently with the feed assembly H5 therefore iaws 13,14feed in timetherewith. Finger H2 and the coacting fingers M I "i'2jm'0vethe blank and the fias'h, respectively during the initialr 180of the cycle,-rat, which time they are depositedrin appropriate. chutesH0, H1. During th latter 180oi the cycle, the said fingers return tonormalin preparation for the next cycle. 7

It 1isunderstood however that the above process is continuously repeatedand every :cycle a finished article is produced. H

Where cooling is desired between the rolling an'd trimmi-ng operations,the units 1'89 are'ar- -ranged to grasp the rolled blank on the platformI11 where it was deposited during the second cycle. Where'the jaws I3, I3 previously engaged the blank, the units 189 now perio'rm thefsamefunction during the first part of the third cycle. The time is notcritical at this part, there being approximately 210 of the third cycleremaining. However, the releasing of the new cooled blank by the units189 isarranged to occur 'just prior to the closing of the jaws 53, M.This timing "arrangement is accomplished by predetermining the length ofthe conveyor belt and by planned spacing of the-units 189.

While one form or embodiment of the invention has been shown anddescribed herein for illustrative purposes, and the construction andarrangement incidental to a specific application thereof have beendisclosed and discussed in detail, it istO be understood that theinvention is limited neither to the mere details orrelative arrangementof parts, nor to its specific embodiment shown herein, but thatextensive deviations from the illustrated form or embodiment of theinvention may be made withoutd'eparting from its principles thereof.

I claim:

1; A trimming machine for forged blank'szcomprising a frame a'blockmounted for longitudinal I travel on the frame and providedwith inwardlymovable fingers which grasp'and feed theio'rged blanks to the trimmingand punching stationya male trimming die slidaibly supported in theframe for downward movement, a fixed female the having 'an openingcorresponding-to the .contour of the male die and a yield'able plungertherein arranged to move the "blank outxof the --female die,positive-drive means for raising said plunger, chutes for the blank andthe flash, a blank delivering finger .pivotally .mountedon the blockformoving. the blank to one chute icam means for raisingthe fingeriorthe returnmove- :ment and a flash-gripping assembly comprising fixedand movable fingersmounted on the block for deliveringthefiashtozanother chute.

-2.-A. trimming and punching machine for forged blanks comprisingaframe; a blank'feeding assembly mounted for longitudinal travel on theframe and provided with inwardly movable fingers which grasp theiorgedblank and deliver it to a trimming andpunching station, a maletrimming die slidably supported inthe frame for upwn ard movement, a;punching die carried by Lthetrimniing die; a fixed female die :having.an

opening-corresponding to the contour'pf the-male die and ayieldableaplung'er therein arranged to move theblank out of the female-,die, a blank deliverm finger z-pivo ly. moun e on the bl nk feedingassembly -ior -delivering the trimmed blank, -an ielongated cam forraising the finger during returnmovement, "a, fiash-gripping-assembly;comprising fi ers mounted on the conveyor assembly for deliveringthezfiash after the trimmine operation. v r 7 trimming machine of ,;thechar acter;described and comprising a frame, a blank -feeding assemblymounted for longitudinal travel on the fr me nd; p ovided with, inwa y.movable fin ers wh ch; rasp and e a o ed blankito he mm n narl-in hin sationamale trimming'die slidably' 'supported in the frame for downwardmovement, a fixed iema le die having an opening corresponding to thecontour of the male die and a yieldableplungertherein arranged to movethe blank out "of the female die, chutes for the blank and the fiash,blank delivering means pivotally mountedon the conveyor as?sembly'iorirnoving theblank to one chutaza fiashgripping assemblycomprising fingers-mounted onthe blankieeding assembly for deliveringthe fiash to anotherchute, one of said fingers being movable and anotherbeing fixed and'means for moving the movable finger toward the fixedfinger during forward travel of the conveyor assembly and releasing itduring rear-ward travel thereof. V p I d fl. A trimming and punchingmachine -f or forged blanks comprising a -frame, a block mounted forlongitudinal travel on the frame'and provided with inwardly 'movablefingers which grasp and feed the 'forged blanks tothe trimming andpunching station, a :male trimming dieslidably supported in the irameiordownward movem uneh efiie arr ed by h m ad e a fixed femaledie havinganopening corresponding to the contour of the male die and a yieldableplunger thereinarranged to movethe blankout or theIfemale die, chutesior the blankgand iorzthe 'fiash, alblank delivering finger pivotallymounted on the block for moving the blank toonechute, an; elongated camfor raising the finger during the return movemenaa fiash grippingassembly comprising fired and movable fingers mountedon the block for,delivering the. flash to -another chute, and means for moving themovablefinger toward Ith fixed finger during .forward travel 9; 17h tivel there forged .bla'nks comprising a frame, a block mounted forlongitudinal travel onrthe frame and provided with inwardly movablefingers which grasp and feed the forged blanksto the trimming andpunching station amale trimming dle slidablysupported inl-theff rame fordown ward movement, a punching die associated with th'eitrimming die, .afixedyifmale die havin -fi opening corresponding to the contourofthemale die and a yield'able plunger therein arranged to more the blankout of the female die, a blank deliveringfinger pivotally mounted .onthe block .formoving-the trimmed blank from said station,

an elongated cam for 2 raising the finger for the and =:re1easing.itduring rearward t'ravl menu-r .relea'singitsgrip during rearward andcomprising an elongated floating cam, mounted in the frame, a pincarried by the finger which engages one edge of the cam during forwardtravel and another edge of the cam during rearward travel.

6. A machine for trimming forgings and comprising a frame, means forfeeding the forged blanks to the trimming assembly, fixed and movabletrimming dies which operate on the blank, a blank delivering fingerpivotally mounted on the feeding means for moving the trimmed blank fromthe dies, an elongated cam for raising the finger for the returnmovement, a flash-gripping assembly comprising fixed and movable fingersmounted on the feeding means for moving the flash away from saidstation, and means for moving the movable finger toward the fixed fingerREFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,659,522 Ekvall Feb. 14, 19281,674,112 Hering June 19, 1928 2,005,152 Lose June 18, 1935

